Willie Mae Thornton was one of the crucial donors in the transfusion of black Southern blues into two separate veins of white rock & roll in America. Born in southern Alabama in 1926, she was inducted into the Blues Foundation’s Blues Hall of Fame the same year she died, in 1984. Although she could not read music, she was a respected colleague of Robert “Junior” Parker, T-Bone Walker, Muddy Waters, John Lee Hooker, Clifton Chenier, Howlin’ Wolf, Buddy Guy, B. B. King, Gatemouth Brown, Bobby “Blue” Bland, James Cotton—everybody who was anybluesbody. But Big Mama’s name comes up today mostly in discussions of two songs that tethered her to white rock & roll history.